.play_btn {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 100%;
    background-image: linear-gradient(45deg, #5298ff, #ff00a8);
    box-shadow: 0 1px 2px 1px rgba(0, 0, 0, 0.2);
}
.play_btn::before {
    content: '';
    position: absolute;
    left: 21px;
    top: 50%;
    margin-left: -4px;
    margin-top: -8px;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    border-left-color: white;
    border-top-width: 8px;
    border-block-width: 8px;
    filter: drop-shadow(0 2px 1px rgba(0, 0, 0,0.2));
    transition: all .2s ease;
    will-change: border-width, height, left;
}
.play_btn::after {
    content: '';
    position: absolute;
    right: 16px;
    top: 50%;
    margin-right: -4px;
    margin-top: -8px;
    width: 0;
    height: 16px;
    border: 5px solid transparent;
    border-width: 0 0 0 5px;
    border-left-color: white;
    filter: drop-shadow(0 2px 1px rgba(0, 0, 0, 0.2));
    opacity: 0;
    transform: scale(0);
    transition: all .2s ease;
}
.play_btn:hover::before {
    border-width: 0 0 0 5px;
    height: 16px;
    left: 16px;
}
.play_btn:hover::after {
    opacity: 1;
    transform: scale(1);
}